#!/usr/bin/perl
use strict;
use warnings 'all';

use Lingua::EN::Inflect;

my $beer = abs (shift || 99);

sub UNIVERSAL::TIEHASH {bless [] => shift}
sub UNIVERSAL::FETCH   {no strict 'refs';
                        &{"Lingua::EN::Inflect::" . ref $_ [0]}
                                                   (split /$;/ => $_ [1])}
tie my %N => 'NUMWORDS';
tie my %B => 'PL';

print <<"--" while $beer;
   \u$N{$beer} $B{bottle => $beer} of beer on the wall,
   $N{$beer} $B{bottle => $beer --} of beer.
   Take one down,
   pass it around.
   \u$N{$beer} $B{bottle => $beer} of beer on the wall.

--
package NUMWORDS;
package PL;
__END__